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Finding the Fourth Proportional to 13,112.51, 18,101.95 and 8,885.90

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Solution

The fourth proportional to 13,112.51, 18,101.95 and 8,885.90 is: 12,267.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,112.51 : 18,101.95 = 8,885.90 : x
  2. Step 2: Convert to fraction form
    13,112.51/18,101.95 = 8,885.90/x
  3. Step 3: Cross multiply
    13,112.51x = 18,101.95 × 8,885.90
  4. Step 4: Simplify right side
    13,112.51x = 160,852,140.55
  5. Step 5: Solve for x
    x = 160,852,140.55/13,112.51
  6. Step 6: Final answer
    x = 12,267.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.